Brown hair, brown eyes, medium height and a slight British accent — seems like an ideal man for many.

For UW staff member Rebecca Jane Griego, the described prince charming turned out to be not only her killer, but also a mystery.

UW Police have confirmed Jonathan Rowan, 41, of Seattle as the killer of Griego, 26. Though her former boyfriend is currently known to the UWPD by this name, Rowan also had several aliases, including Nathan Rowan and Robert Richardson.

The killer, who entered the United States from the United Kingdom in 1996, also possessed two passports and multiple drivers' licenses.

"His identity is not certain," UWPD Assistant Chief Ray Wittmier said. "This identification may be a stolen identification."

According to U.S. Citizenship and Immigration Services, Rowan entered the country with an open green card and a valid passport. There is no reason to think he was here illegally, Wittmier said.

The UWPD is currently using International Criminal Police Organization (Interpol) to positively identify the man. It could take weeks, however, before his identity is confirmed.

Though police are uncertain of his exact work history, Rowan appears to have been self-employed and did odd jobs he found on Craigslist.

He often wore tinted glasses and stuttered slightly. He liked to drink and, according to Griego's restraining order petition, was likely very dangerous.

The firearm used was a .357-caliber, six-shot revolver. According to the Bureau of Alcohol, Tobacco and Firearms, it was last registered in 1995 and sold by a dealer in Tucson, Ariz. to a private individual.

Police suspect Rowan stole the weapon from a private individual, but are uncertain as to whether this person was an acquaintance of the killer or if the bullets belonged to the gun owner.

It is confirmed, however, that the gun was stolen locally.

Griego knew Rowan for six years and dated him for four. Though the couple ended their relationship in 2004, they lived together until earlier this year.

The UWPD corrected a previous statement claiming Griego was not willing to pursue prosecution. The victim was indeed willing to testify against Rowan, UWPD Chief Vicky Stormo said.

After Griego filed a report with the UWPD on March 16 concerning threatening phone calls March 7 and 14, both University and Seattle Police were unable to locate Rowan. Because his whereabouts were unknown, the report had not yet been filed with the court.

He had moved several times and, in recent years, had at least four different Ballard addresses. Griego also had no knowledge of her stalker's residence.

Rowan also had an outstanding warrant on a DUI, which he could have been arrested for immediately had police been able to locate him.

Though DUIs are crucial, the distress Rowan caused his ex-girlfriend was much more grave.

"The more serious issue was the threats and what he was doing to our victim, Rebecca," Wittmier said.

From changing residences to working from home, Griego did everything in her power to keep herself out of harm's way.

"She did all the things a person could do ... she tried to stay safe," Wittmier said.

Reach reporter Meghan Peters at news@thedaily.washington.edu.